JP6960379B2 - Storage container and storage method for radioactive materials or containers containing radioactive materials - Google Patents

Storage container and storage method for radioactive materials or containers containing radioactive materials Download PDF

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JP6960379B2
JP6960379B2 JP2018140120A JP2018140120A JP6960379B2 JP 6960379 B2 JP6960379 B2 JP 6960379B2 JP 2018140120 A JP2018140120 A JP 2018140120A JP 2018140120 A JP2018140120 A JP 2018140120A JP 6960379 B2 JP6960379 B2 JP 6960379B2
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radioactive substance
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和 宮本
学 上野
雄一 松下
直己 福士
義春 菊地
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Hitachi GE Nuclear Energy Ltd
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Description

本発明は、放射性物質または放射性物質を収納した容器の保管容器と保管方法に関する。 The present invention relates to a storage container and a storage method of a radioactive substance or a container containing a radioactive substance.

原子力発電所などの原子力施設で発生した放射性廃棄物などの放射性物質または放射性物質を収納した容器は、保管容器に収納されて保管される。 A container containing radioactive substances such as radioactive waste generated in a nuclear facility such as a nuclear power plant or radioactive substances is stored in a storage container.

特許文献１には、放射性物質を収納した容器（ガラス固化体）を保管する設備であり、耐震サポートを備えて耐震性が考慮されたガラス固化体貯蔵設備の例が記載されている。特許文献１に記載のガラス固化体貯蔵設備は、貯蔵ピットの上部の天井スラブに上端が固定されて吊り下げ支持されたガラス固化体収納用の内管の外周が外管で覆われ、内管と外管の間に冷却空気を流すよう構成されたガラス固化体貯蔵設備であって、外管垂直方向支持板と上部及び下部耐震サポートが、長さ調整可能な耐震ラグにより狭隘部となる井桁状の支持架構に取り付けられている。 Patent Document 1 describes an example of a vitrified body storage facility that is a facility for storing a container (vitrified body) containing a radioactive substance and is provided with a seismic support and is considered to have seismic resistance. In the vitrified material storage facility described in Patent Document 1, the outer periphery of the inner pipe for storing the vitrified material, which is suspended and supported by fixing the upper end to the ceiling slab above the storage pit, is covered with an outer pipe, and the inner pipe is covered. A vitrified material storage facility configured to allow cooling air to flow between the outer pipe and the outer pipe. It is attached to a support frame.

特開２００９−８００５６号公報Japanese Unexamined Patent Publication No. 2009-80056

特許文献１に記載されたガラス固化体貯蔵設備など、従来の放射性物質または放射性物質を収納した容器の保管設備では、放射性物質または放射性物質を収納した容器の保管容器の外部に耐震装置を備えている。保管容器の内部には、保管容器に収納された放射性物質または放射性物質を収納した容器と保管容器との間に隙間があり、地震などの振動により放射性物質または放射性物質を収納した容器と保管容器とが水平方向と鉛直方向（上下方向）に衝突することが考えられる。従来の技術では、保管容器の内部で、放射性物質または放射性物質を収納した容器と保管容器とが衝突することについて十分に考慮されていない。この衝突により放射性物質または放射性物質を収納した容器と保管容器に加わる衝撃を小さくするためには、例えば、放射性物質または放射性物質を収納した容器と保管容器の隙間を小さくする方法がある。しかし、この隙間を小さくするには高精度な寸法を持つ保管容器が必要であり、このような保管容器の製造は、難しく高コストである。さらに、この隙間が小さい保管容器に放射性物質または放射性物質を収納した容器を収納するのは難しい。このため、放射性物質または放射性物質を収納した容器と保管容器の隙間を小さくして、保管容器の内部での放射性物質または放射性物質を収納した容器と保管容器との衝突を抑制して、放射性物質または放射性物質を収納した容器と保管容器に衝撃が加わるのを防ぐのは、実用的ではない。 Conventional storage equipment for containers containing radioactive substances or radioactive substances, such as the vitrified material storage equipment described in Patent Document 1, is provided with a seismic resistance device outside the storage container for radioactive substances or containers containing radioactive substances. There is. Inside the storage container, there is a gap between the radioactive substance stored in the storage container or the container containing the radioactive substance and the storage container, and the container and storage container containing the radioactive substance or radioactive substance due to vibration such as an earthquake. Can collide with each other in the horizontal direction and the vertical direction (vertical direction). Conventional techniques have not fully considered the collision of radioactive material or the container containing the radioactive material with the storage container inside the storage container. In order to reduce the impact applied to the radioactive substance or the container containing the radioactive substance and the storage container due to this collision, for example, there is a method of reducing the gap between the radioactive substance or the container containing the radioactive substance and the storage container. However, in order to reduce this gap, a storage container having high precision dimensions is required, and manufacturing such a storage container is difficult and expensive. Further, it is difficult to store a radioactive substance or a container containing a radioactive substance in a storage container having a small gap. Therefore, the gap between the container containing the radioactive substance or the radioactive substance and the storage container is reduced to suppress the collision between the container containing the radioactive substance or the radioactive substance and the storage container inside the storage container, and the radioactive substance. Or, it is not practical to prevent the container containing the radioactive material and the storage container from being impacted.

このように、従来の技術では、放射性物質または放射性物質を収納した容器の保管容器の内部での、放射性物質または放射性物質を収納した容器の振動（特に水平方向の振動）について十分に考慮されておらず、保管容器の内部で、放射性物質または放射性物質を収納した容器と保管容器とが衝突することを抑制するのが難しいことに課題がある。 Thus, in the prior art, the vibration of the radioactive material or the container containing the radioactive material (particularly the horizontal vibration) inside the storage container of the container containing the radioactive material or the radioactive material is fully considered. Therefore, there is a problem that it is difficult to prevent the radioactive substance or the container containing the radioactive substance from colliding with the storage container inside the storage container.

本発明の目的は、放射性物質または放射性物質を収納した容器の保管容器の内部で、放射性物質または放射性物質を収納した容器と保管容器とが衝突することを抑制できる、放射性物質または放射性物質を収納した容器の保管容器と保管方法を提供することである。 An object of the present invention is to store a radioactive substance or a radioactive substance inside a storage container of a container containing a radioactive substance or a radioactive substance, which can prevent the container containing the radioactive substance or the radioactive substance from colliding with the storage container. It is to provide a storage container and a storage method for the prepared container.

本発明による放射性物質または放射性物質を収納した容器の保管容器は、上部に開口部を有し、複数の放射性物質または放射性物質を収納した複数の容器を上下方向に積んで収納可能な筒状部と、上下方向に積まれた前記放射性物質または前記容器の間に設置される緩衝部材と、前記開口部に設置される蓋と、最上部の前記放射性物質または前記容器と前記蓋との間に設置される弾性部材とを備える。前記緩衝部材は、平板部材と、前記平板部材に設置され、前記平板部材から水平方向に突出する緩衝部とを備える。 The storage container of the radioactive substance or the container containing the radioactive substance according to the present invention has an opening at the upper part, and is a tubular portion capable of vertically stacking and storing a plurality of radioactive substances or a plurality of containers containing the radioactive substance. And the cushioning member installed between the radioactive material or the container stacked in the vertical direction, the lid installed at the opening, and the radioactive material at the top or between the container and the lid. It is provided with an elastic member to be installed. The cushioning member includes a flat plate member and a cushioning portion which is installed on the flat plate member and projects horizontally from the flat plate member.

本発明によると、放射性物質または放射性物質を収納した容器の保管容器の内部で、放射性物質または放射性物質を収納した容器と保管容器とが衝突することを抑制できる、放射性物質または放射性物質を収納した容器の保管容器と保管方法を提供することができる。 According to the present invention, a radioactive substance or a radioactive substance that can prevent the container containing the radioactive substance or the radioactive substance from colliding with the storage container is stored inside the storage container of the container containing the radioactive substance or the radioactive substance. Container storage Containers and storage methods can be provided.

放射性物質または放射性物質を収納した容器を保管する保管施設の一例の概要を示す図。The figure which shows the outline of an example of the storage facility which stores a radioactive substance or a container containing a radioactive substance. 本発明の実施例１による放射性物質または放射性物質を収納した容器の保管容器の縦断面図。The vertical sectional view of the storage container of the radioactive substance or the container containing the radioactive substance according to Example 1 of this invention. 本発明の実施例１による放射性物質または放射性物質を収納した容器の保管容器の緩衝部材の縦断面図。FIG. 3 is a vertical cross-sectional view of a radioactive substance or a cushioning member of a storage container of a container containing a radioactive substance according to Example 1 of the present invention. 本発明の実施例１による放射性物質または放射性物質を収納した容器の保管容器の緩衝部材の上面図。Top view of the cushioning member of the storage container of the radioactive substance or the container containing the radioactive substance according to Example 1 of the present invention. 本発明の実施例２による放射性物質または放射性物質を収納した容器の保管容器の縦断面図。FIG. 3 is a vertical cross-sectional view of a radioactive substance or a storage container of a container containing a radioactive substance according to Example 2 of the present invention. 本発明の実施例２による放射性物質または放射性物質を収納した容器の保管容器の緩衝部材の縦断面図。FIG. 3 is a vertical cross-sectional view of a radioactive substance or a cushioning member of a storage container of a container containing a radioactive substance according to Example 2 of the present invention. 本発明の実施例２による放射性物質または放射性物質を収納した容器の保管容器において、放射性物質または放射性物質を収納した容器が緩衝部材の上面部に載置された状態の緩衝部材の縦断面図。FIG. 3 is a vertical cross-sectional view of a buffer member in a state in which a container containing a radioactive substance or a radioactive substance is placed on an upper surface portion of the buffer member in a storage container of a radioactive substance or a container containing the radioactive substance according to the second embodiment of the present invention. 本発明の実施例２による放射性物質または放射性物質を収納した容器の保管容器の緩衝部材の上面図。Top view of the cushioning member of the storage container of the radioactive substance or the container containing the radioactive substance according to the second embodiment of the present invention.

原子力発電所で発生した使用済燃料などの放射性物質またはこの放射性物質を収納した容器は、保管容器に収納されて保管される。本発明による保管容器は、放射性物質を直接収納して保管することも、放射性物質を収納した容器を保管することもできる。すなわち、本発明による保管容器は、放射性物質と放射性物質を収納した容器との一方または両方を保管することができる。 Radioactive materials such as spent fuel generated at nuclear power plants or containers containing these radioactive materials are stored in storage containers. The storage container according to the present invention can directly store and store radioactive substances, or can store containers containing radioactive substances. That is, the storage container according to the present invention can store one or both of the radioactive substance and the container containing the radioactive substance.

本発明による放射性物質または放射性物質を収納した容器の保管容器は、上下方向に積み重ねられて収納された放射性物質または放射性物質を収納した容器の間に緩衝部材が設置され、最上部の放射性物質または放射性物質を収納した容器と蓋との間に弾性部材が設置される。緩衝部材は、水平方向に突出して保管容器の内周面と接触可能な緩衝部を備え、放射性物質または放射性物質を収納した容器と保管容器（保管容器の内周面）との衝突を抑制する。本発明による放射性物質または放射性物質を収納した容器の保管方法では、保管容器内で放射性物質または放射性物質を収納した容器と緩衝部材とを上下方向に交互に配置し、弾性部材を最上部に位置する放射性物質または放射性物質を収納した容器の上に載置する。 In the storage container of the radioactive substance or the container containing the radioactive substance according to the present invention, a buffer member is installed between the radioactive substances or the container containing the radioactive substance stacked in the vertical direction, and the radioactive substance at the top or the container containing the radioactive substance is installed. An elastic member is installed between the container containing the radioactive material and the lid. The cushioning member is provided with a cushioning portion that projects horizontally and can come into contact with the inner peripheral surface of the storage container, and suppresses a collision between the radioactive substance or the container containing the radioactive substance and the storage container (inner peripheral surface of the storage container). .. In the storage method of the radioactive substance or the container containing the radioactive substance according to the present invention, the container containing the radioactive substance or the radioactive substance and the cushioning member are alternately arranged in the vertical direction in the storage container, and the elastic member is positioned at the top. Place on a container containing radioactive material or radioactive material.

本発明による放射性物質または放射性物質を収納した容器の保管容器では、緩衝部材と弾性部材により、保管容器の内部で、放射性物質または放射性物質を収納した容器と保管容器とが衝突することを抑制する。 In the storage container of the radioactive substance or the container containing the radioactive substance according to the present invention, the cushioning member and the elastic member prevent the container containing the radioactive substance or the radioactive substance from colliding with the storage container inside the storage container. ..

以下、本発明の実施例による放射性物質または放射性物質を収納した容器の保管容器と保管方法について、図面を用いて説明する。 Hereinafter, the storage container and the storage method of the radioactive substance or the container containing the radioactive substance according to the embodiment of the present invention will be described with reference to the drawings.

本発明の実施例１による放射性物質または放射性物質を収納した容器の保管容器と保管方法を、図１〜図４を用いて説明する。 The storage container and storage method of the radioactive substance or the container containing the radioactive substance according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4.

図１は、放射性物質または放射性物質を収納した容器を保管する保管施設の一例の概要を示す図である。保管施設３は、放射線を遮蔽するコンクリートなどの遮蔽部材で構成された建屋からなり、放射性物質１または放射性物質を収納した容器１を収納した保管容器２を保管する。保管施設３は、放射性物質１または放射性物質を収納した容器１の取扱いに必要な遮蔽厚さと耐震機能を備える。保管施設３は、保管容器２に放射性物質１または放射性物質を収納した容器１を収納し、保管容器２の蓋１１を閉める作業を実施する仕立てエリア７と、複数の保管容器２を保管する保管エリア４を備える。保管容器２は、放射性物質１または放射性物質を収納した容器１を保管し、保管施設３内の自然対流による空気の流れで冷却される。 FIG. 1 is a diagram showing an outline of an example of a storage facility for storing radioactive substances or containers containing radioactive substances. The storage facility 3 is composed of a building made of a shielding member such as concrete that shields radiation, and stores a radioactive substance 1 or a storage container 2 containing a container 1 containing a radioactive substance. The storage facility 3 has a shielding thickness and a seismic resistance function necessary for handling the radioactive substance 1 or the container 1 containing the radioactive substance. The storage facility 3 stores the radioactive substance 1 or the container 1 containing the radioactive substance in the storage container 2, and stores the tailoring area 7 for closing the lid 11 of the storage container 2 and the storage for storing the plurality of storage containers 2. It has an area 4. The storage container 2 stores the radioactive substance 1 or the container 1 containing the radioactive substance, and is cooled by the air flow due to natural convection in the storage facility 3.

原子力発電所で発生した使用済燃料などの放射性物質１または放射性物質を収納した容器１は、移送容器６に収納される。放射性物質１または放射性物質を収納した容器１を収納した移送容器６は、移送車やクレーン５などにより、保管施設３の仕立てエリア７に搬入される。仕立てエリア７では、クレーン５などの搬送設備が、移送容器６から放射性物質１または放射性物質を収納した容器１を取り出し、保管容器２に放射性物質１または放射性物質を収納した容器１を収納し、保管容器２に蓋１１を装着する。保管容器２は、受入れ検査を受けた後に保管エリア４に搬入され、保管エリア４の床に固定されている架台８に設置される。 The radioactive material 1 such as spent fuel generated at the nuclear power plant or the container 1 containing the radioactive material is stored in the transfer container 6. The radioactive material 1 or the transfer container 6 containing the container 1 containing the radioactive material is carried into the tailoring area 7 of the storage facility 3 by a transfer vehicle, a crane 5, or the like. In the tailoring area 7, a transport facility such as a crane 5 takes out the radioactive substance 1 or the container 1 containing the radioactive substance from the transfer container 6, and stores the radioactive substance 1 or the container 1 containing the radioactive substance in the storage container 2. The lid 11 is attached to the storage container 2. The storage container 2 is carried into the storage area 4 after undergoing an acceptance inspection, and is installed on a gantry 8 fixed to the floor of the storage area 4.

保管容器２の内部では、より多くの放射性物質１または放射性物質を収納した容器１を保管するために、複数の放射性物質１または放射性物質を収納した複数の容器１が上下方向に積まれて収納される。保管容器２の内部で複数の放射性物質１または放射性物質を収納した複数の容器１が上下方向に積まれて収納されていると、放射性物質１または放射性物質を収納した容器１が上下方向に積まれて収納されていない場合と比較して、地震や保管容器２の転倒等によって保管容器２に加わる衝撃が大きい。保管容器２に衝撃が加わると、保管容器２の内部で、放射性物質１または放射性物質を収納した容器１と保管容器２とが衝突し、上下方向に積まれた放射性物質１または放射性物質を収納した容器１同士も衝突する。この衝突による放射性物質１または放射性物質を収納した容器１と保管容器２の破損を防ぐために、放射性物質１または放射性物質を収納した容器１と保管容器２が衝突することを抑制できる保管方法が必要である。 Inside the storage container 2, in order to store a larger amount of radioactive material 1 or a container 1 containing radioactive material, a plurality of radioactive material 1 or a plurality of containers 1 containing radioactive material are stacked and stored in the vertical direction. Will be done. When a plurality of radioactive substances 1 or a plurality of containers 1 containing radioactive substances are stacked and stored in the storage container 2 in the vertical direction, the radioactive substance 1 or the container 1 containing the radioactive substances is stacked in the vertical direction. Compared with the case where the storage container 2 is not stored in a mixed state, the impact applied to the storage container 2 due to an earthquake, a fall of the storage container 2, or the like is large. When an impact is applied to the storage container 2, the radioactive substance 1 or the container 1 containing the radioactive substance collides with the storage container 2 inside the storage container 2, and the radioactive substance 1 or the radioactive substance piled up in the vertical direction is stored. The containers 1 are also collided with each other. In order to prevent damage to the radioactive substance 1 or the container 1 containing the radioactive substance and the storage container 2 due to this collision, a storage method capable of suppressing the collision between the radioactive substance 1 or the container 1 containing the radioactive substance and the storage container 2 is required. Is.

図２は、本発明の実施例１による放射性物質１または放射性物質を収納した容器１の保管容器２の縦断面図である。保管容器２は、筒状部２２と、蓋１１と、緩衝部材９と、弾性部材１０を備える。筒状部２２は、上部に開口部を有し、下部に底面を有し、複数の放射性物質１または放射性物質を収納した複数の容器１を上下方向に積み重ねて収納可能である。蓋１１は、筒状部２２の開口部に設置される。保管容器２は、１つまたは複数の緩衝部材９を備えることができる。 FIG. 2 is a vertical cross-sectional view of the radioactive substance 1 or the storage container 2 of the container 1 containing the radioactive substance according to the first embodiment of the present invention. The storage container 2 includes a tubular portion 22, a lid 11, a cushioning member 9, and an elastic member 10. The tubular portion 22 has an opening at an upper portion and a bottom surface at a lower portion, and can store a plurality of radioactive substances 1 or a plurality of containers 1 containing radioactive substances by stacking them in the vertical direction. The lid 11 is installed in the opening of the tubular portion 22. The storage container 2 may include one or more cushioning members 9.

緩衝部材９は、上下方向に積まれた放射性物質１または放射性物質を収納した容器１同士の間に位置するように筒状部２２の内部に設置され、水平方向の振動が加わったときに、放射性物質１または放射性物質を収納した容器１と保管容器２との衝突を抑制する。弾性部材１０は、最上部の放射性物質１または放射性物質を収納した容器１に載置されて、最上部の放射性物質１または放射性物質を収納した容器１と蓋１１との間に設置され、上下方向の振動が加わったときに、放射性物質１または放射性物質を収納した容器１と蓋１１との衝突を抑制する。緩衝部材９と弾性部材１０は、上下方向に積まれた放射性物質１または放射性物質を収納した容器１同士の衝突も抑制する。なお、弾性部材１０は、最上部の放射性物質１または放射性物質を収納した容器１と蓋１１に固定されても固定されなくてもよい。 The cushioning member 9 is installed inside the tubular portion 22 so as to be located between the radioactive substances 1 stacked in the vertical direction or the containers 1 containing the radioactive substances, and when horizontal vibration is applied, the buffer member 9 is installed. Suppresses collision between the radioactive substance 1 or the container 1 containing the radioactive substance and the storage container 2. The elastic member 10 is placed on the uppermost radioactive substance 1 or the container 1 containing the radioactive substance, and is installed between the uppermost radioactive substance 1 or the container 1 containing the radioactive substance and the lid 11, and is placed up and down. When a directional vibration is applied, the collision between the radioactive substance 1 or the container 1 containing the radioactive substance and the lid 11 is suppressed. The cushioning member 9 and the elastic member 10 also suppress collisions between the radioactive substances 1 stacked in the vertical direction or the containers 1 containing the radioactive substances. The elastic member 10 may or may not be fixed to the uppermost radioactive substance 1 or the container 1 containing the radioactive substance and the lid 11.

緩衝部材９は、後述するように、平板部材１２、上部環状部材１３、下部環状部材１４、及び外側板バネ１５を備える。筒状部２２は、円筒形でも角筒形でもよい。以下では、筒状部２２が円筒形であるとする。 As will be described later, the cushioning member 9 includes a flat plate member 12, an upper annular member 13, a lower annular member 14, and an outer leaf spring 15. The tubular portion 22 may be cylindrical or square tubular. In the following, it is assumed that the tubular portion 22 has a cylindrical shape.

図３は、緩衝部材９の縦断面図である。図４は、緩衝部材９の上面図である。緩衝部材９は、平板部材１２、上部環状部材１３、下部環状部材１４、外側板バネ１５、内側板バネ１６、及び吊り部１７を備える。 FIG. 3 is a vertical cross-sectional view of the cushioning member 9. FIG. 4 is a top view of the cushioning member 9. The cushioning member 9 includes a flat plate member 12, an upper annular member 13, a lower annular member 14, an outer leaf spring 15, an inner leaf spring 16, and a suspension portion 17.

平板部材１２は、円形の平板である。筒状部２２が角筒形であれば、平板部材１２は、多角形の平板である。緩衝部材９は、平板部材１２が筒状部２２の底面に沿う向きで、筒状部２２の内部に設置される。 The flat plate member 12 is a circular flat plate. If the tubular portion 22 has a square cylindrical shape, the flat plate member 12 is a polygonal flat plate. The cushioning member 9 is installed inside the cylindrical portion 22 with the flat plate member 12 facing along the bottom surface of the tubular portion 22.

上部環状部材１３は、平板部材１２の上面に立設する円環状の部材である。下部環状部材１４は、平板部材１２の下面に立設する円環状の部材である。上部環状部材１３と下部環状部材１４は、保管容器２に収納された放射性物質１または放射性物質を収納した容器１の周囲を囲むことができる内径を持つ。すなわち、放射性物質１または放射性物質を収納した容器１は、上部環状部材１３と下部環状部材１４の少なくとも一方に嵌って保管容器２に収納される（図２と後述する図５を参照）。 The upper annular member 13 is an annular member that stands on the upper surface of the flat plate member 12. The lower annular member 14 is an annular member that stands on the lower surface of the flat plate member 12. The upper annular member 13 and the lower annular member 14 have an inner diameter capable of surrounding the radioactive substance 1 stored in the storage container 2 or the container 1 containing the radioactive substance. That is, the radioactive substance 1 or the container 1 containing the radioactive substance is fitted in at least one of the upper annular member 13 and the lower annular member 14 and stored in the storage container 2 (see FIG. 2 and FIG. 5 described later).

外側板バネ１５は、平板部材１２の外周部に、周方向に９０°ごとに４個設置されている緩衝部である。外側板バネ１５は、平板部材１２から水平方向に突出し、保管容器２の内周面（筒状部２２の内周面）と接触可能な板バネである。内側板バネ１６は、上部環状部材１３の内周面に、周方向に９０°ごとに４個設置されているとともに、下部環状部材１４の内周面に、周方向に９０°ごとに４個設置されている。内側板バネ１６は、放射性物質１または放射性物質を収納した容器１と接触可能な板バネである。 The outer leaf springs 15 are cushioning portions that are installed on the outer peripheral portion of the flat plate member 12 at intervals of 90 ° in the circumferential direction. The outer leaf spring 15 is a leaf spring that projects horizontally from the flat plate member 12 and can come into contact with the inner peripheral surface of the storage container 2 (the inner peripheral surface of the tubular portion 22). Four inner leaf springs 16 are installed on the inner peripheral surface of the upper annular member 13 at 90 ° intervals in the circumferential direction, and four inner leaf springs 16 are installed on the inner peripheral surface of the lower annular member 14 at 90 ° intervals in the circumferential direction. is set up. The inner leaf spring 16 is a leaf spring that can come into contact with the radioactive substance 1 or the container 1 containing the radioactive substance.

吊り部１７は、上部環状部材１３の上端部に、周方向に９０°ごとに４個設置されている。吊り部１７は、緩衝部材９の全体を移動させるために、搬送設備（例えば、クレーン５のフック等）に吊り下げられる部材である。 Four suspension portions 17 are installed at the upper end portion of the upper annular member 13 at 90 ° intervals in the circumferential direction. The suspension portion 17 is a member suspended from a transport facility (for example, a hook of a crane 5 or the like) in order to move the entire cushioning member 9.

外側板バネ１５、内側板バネ１６、及び吊り部１７の数は、４個でなくてもよく、耐衝撃強度と構造強度を満足する数であれば、任意に定めることができる。これらの数は、互いに異なってもよい。外側板バネ１５と吊り部１７の数は、保管容器２の筒状部２２に緩衝部材９を収納するときの作業性を考慮して、それぞれ２個以上とするのが好ましい。内側板バネ１６の数は、緩衝部材９に放射性物質１または放射性物質を収納した容器１を取り付ける（上部環状部材１３と下部環状部材１４に放射性物質１または放射性物質を収納した容器１を嵌める）ときの作業性を考慮して、２個以上とするのが好ましい。 The number of the outer leaf spring 15, the inner leaf spring 16, and the suspension portion 17 does not have to be four, and can be arbitrarily determined as long as the number satisfies the impact resistance and the structural strength. These numbers may differ from each other. The number of the outer leaf spring 15 and the suspension portion 17 is preferably two or more in consideration of workability when the cushioning member 9 is stored in the tubular portion 22 of the storage container 2. The number of inner leaf springs 16 is such that the buffer member 9 is attached with the radioactive substance 1 or the container 1 containing the radioactive substance (the upper annular member 13 and the lower annular member 14 are fitted with the radioactive substance 1 or the container 1 containing the radioactive substance). In consideration of workability at the time, it is preferable to use two or more.

なお、外側板バネ１５と内側板バネ１６の周方向の位置は、図３と図４に示した例では互いに同じであるが、互いに異なってもよい。これらの周方向の位置は、任意に定めることができる。吊り部１７の周方向の位置も、任意に定めることができる。 The positions of the outer leaf spring 15 and the inner leaf spring 16 in the circumferential direction are the same in the examples shown in FIGS. 3 and 4, but may be different from each other. The positions in these circumferential directions can be arbitrarily determined. The position of the hanging portion 17 in the circumferential direction can also be arbitrarily determined.

外側板バネ１５と内側板バネ１６を緩衝部材９に用いるのは、筒状部２２に緩衝部材９を収納するときの作業性と、筒状部２２に放射性物質１または放射性物質を収納した容器１を収納するときの作業性を考慮したためである。緩衝部材９は、外側板バネ１５と内側板バネ１６に用いる板バネの代わりに、コイルバネや弾性体などの緩衝機能を有する部材を備えることができる。 The outer leaf spring 15 and the inner leaf spring 16 are used for the cushioning member 9 because of the workability when the cushioning member 9 is stored in the tubular portion 22 and the container in which the radioactive substance 1 or the radioactive substance is stored in the tubular portion 22. This is because workability when storing 1 is taken into consideration. The cushioning member 9 may include a member having a cushioning function such as a coil spring or an elastic body instead of the leaf spring used for the outer leaf spring 15 and the inner leaf spring 16.

緩衝部材９は、耐熱性と耐腐食性を有する材料（例えば、ステンレス鋼）で構成することができる。弾性部材１０は、金属や樹脂の弾性体で構成することができ、例えばバネで構成することができる。 The cushioning member 9 can be made of a material having heat resistance and corrosion resistance (for example, stainless steel). The elastic member 10 can be made of an elastic body made of metal or resin, and can be made of, for example, a spring.

保管容器２は、保管容器２の内部に上下方向に積まれて収納された放射性物質１または放射性物質を収納した容器１同士の間に緩衝部材９を備え、放射性物質１または放射性物質を収納した容器１と保管容器２との水平方向の隙間には、緩衝部材９の外側板バネ１５が存在する。外側板バネ１５は、保管容器２に衝撃が加わったときに、保管容器２の内部で放射性物質１または放射性物質を収納した容器１と保管容器２とが水平方向に衝突するのを抑制する。 The storage container 2 is provided with a buffer member 9 between the radioactive material 1 or the containers 1 containing the radioactive material that are vertically stacked and stored inside the storage container 2, and stores the radioactive material 1 or the radioactive material. The outer leaf spring 15 of the cushioning member 9 exists in the horizontal gap between the container 1 and the storage container 2. The outer leaf spring 15 prevents the radioactive substance 1 or the container 1 containing the radioactive substance and the storage container 2 from colliding with each other in the horizontal direction inside the storage container 2 when an impact is applied to the storage container 2.

緩衝部材９は、放射性物質１または放射性物質を収納した容器１同士の間に設置されて放射性物質１または放射性物質を収納した容器１同士を連結し、弾性部材１０は、最上部の放射性物質１または放射性物質を収納した容器１と蓋１１との間に設置される。この構成により、保管容器２に衝撃が加わったときに、保管容器２の内部で放射性物質１または放射性物質を収納した容器１同士が上下方向に衝突するのと、放射性物質１または放射性物質を収納した容器１と蓋１１とが上下方向に衝突するのを抑制する。 The buffer member 9 is installed between the containers 1 containing the radioactive substance 1 or the radioactive substance to connect the containers 1 containing the radioactive substance 1 or the radioactive substance, and the elastic member 10 is the uppermost radioactive substance 1. Alternatively, it is installed between the container 1 containing the radioactive material and the lid 11. With this configuration, when an impact is applied to the storage container 2, the radioactive substance 1 or the containers 1 containing the radioactive substances collide with each other in the vertical direction inside the storage container 2, and the radioactive substance 1 or the radioactive substance is stored. It is possible to prevent the container 1 and the lid 11 from colliding with each other in the vertical direction.

このように、本実施例による放射性物質１または放射性物質を収納した容器１の保管容器２は、保管容器２に水平方向と上下方向の振動が加わっても、保管容器２の内部での放射性物質１または放射性物質を収納した容器１と保管容器２との衝突、放射性物質１または放射性物質を収納した容器１同士の衝突、及び放射性物質１または放射性物質を収納した容器１と蓋１１との衝突を抑制する。 As described above, the storage container 2 of the radioactive substance 1 or the container 1 containing the radioactive substance according to the present embodiment is a radioactive substance inside the storage container 2 even if the storage container 2 is subjected to horizontal and vertical vibrations. Collision between 1 or the container 1 containing the radioactive substance and the storage container 2, collision between the containers 1 containing the radioactive substance 1 or the radioactive substance, and collision between the container 1 containing the radioactive substance 1 or the radioactive substance and the lid 11. Suppress.

また、本実施例による放射性物質１または放射性物質を収納した容器１の保管容器２は、放射性物質１または放射性物質を収納した容器１と保管容器２との水平方向の隙間に外側板バネ１５が存在するので、放射性物質１または放射性物質を収納した容器１と保管容器２との隙間が小さくなくてもよく、高精度な寸法で製造する必要がないので、低コストで容易に製造できる。さらに、放射性物質１または放射性物質を収納した容器１と保管容器２との隙間が小さい必要がないので、保管容器２に放射性物質１または放射性物質を収納した容器１を収納するのが容易である。 Further, in the storage container 2 of the radioactive substance 1 or the container 1 containing the radioactive substance according to the present embodiment, the outer leaf spring 15 is provided in the horizontal gap between the container 1 containing the radioactive substance 1 or the radioactive substance and the storage container 2. Since it exists, the gap between the radioactive substance 1 or the container 1 containing the radioactive substance and the storage container 2 does not have to be small, and it is not necessary to manufacture with high precision dimensions, so that it can be easily manufactured at low cost. Further, since the gap between the radioactive substance 1 or the container 1 containing the radioactive substance and the storage container 2 does not need to be small, it is easy to store the radioactive substance 1 or the container 1 containing the radioactive substance in the storage container 2. ..

内側板バネ１６は、放射性物質１または放射性物質を収納した容器１と緩衝部材９との水平方向の隙間に位置し、保管容器２に衝撃が加わったときに、放射性物質１または放射性物質を収納した容器１と緩衝部材９とが水平方向に衝突するのを抑制する。 The inner leaf spring 16 is located in a horizontal gap between the container 1 containing the radioactive substance 1 or the radioactive substance and the buffer member 9, and stores the radioactive substance 1 or the radioactive substance when an impact is applied to the storage container 2. The container 1 and the cushioning member 9 are prevented from colliding with each other in the horizontal direction.

以下では、本実施例による保管容器２に放射性物質１または放射性物質を収納した容器１を保管する方法の例を説明する。保管容器２に放射性物質１または放射性物質を収納した容器１を保管する方法は、仕立てエリア７（図１）で実行される。放射性物質１または放射性物質を収納した容器１、緩衝部材９、及び弾性部材１０は、筒状部２２の開口部から保管容器２の内部に収納される。 Hereinafter, an example of a method of storing the radioactive substance 1 or the container 1 containing the radioactive substance in the storage container 2 according to the present embodiment will be described. The method of storing the radioactive substance 1 or the container 1 containing the radioactive substance in the storage container 2 is executed in the tailoring area 7 (FIG. 1). The radioactive substance 1 or the container 1 containing the radioactive substance, the cushioning member 9, and the elastic member 10 are stored inside the storage container 2 through the opening of the tubular portion 22.

第１の工程では、搬送設備（例えば、クレーン５）は、放射性物質１または放射性物質を収納した容器１（例えば、保管容器２の最下部に位置すべき放射性物質１または放射性物質を収納した容器１）を保管容器２の筒状部２２に収納する。 In the first step, the transport facility (eg, crane 5) is a container 1 containing radioactive material 1 or a container 1 containing radioactive material (eg, a container containing radioactive material 1 or radioactive material to be located at the bottom of the storage container 2). 1) is stored in the tubular portion 22 of the storage container 2.

第２の工程では、搬送設備は、緩衝部材９を保管容器２の筒状部２２に収納する。搬送設備は、緩衝部材９を吊り部１７で吊り下げて筒状部２２の内部に移動させ、保管容器２に収納した放射性物質１または放射性物質を収納した容器１の上部に載置する。このとき、緩衝部材９は、外側板バネ１５が保管容器２の内周面（筒状部２２の内周面）と接触する。緩衝部材９は、下部環状部材１４が放射性物質１または放射性物質を収納した容器１の上部の周囲を囲むように（放射性物質１または放射性物質を収納した容器１の上部が下部環状部材１４に嵌るように）、放射性物質１または放射性物質を収納した容器１に載置される。緩衝部材９は、内側板バネ１６が放射性物質１または放射性物質を収納した容器１の上部の周囲と接触する。 In the second step, the transport equipment stores the cushioning member 9 in the tubular portion 22 of the storage container 2. In the transport equipment, the cushioning member 9 is suspended by the suspension portion 17 and moved inside the tubular portion 22, and is placed on the radioactive substance 1 stored in the storage container 2 or the upper part of the container 1 containing the radioactive substance. At this time, in the cushioning member 9, the outer leaf spring 15 comes into contact with the inner peripheral surface of the storage container 2 (the inner peripheral surface of the cylindrical portion 22). In the cushioning member 9, the lower annular member 14 surrounds the upper part of the container 1 containing the radioactive substance 1 or the radioactive substance (the upper part of the container 1 containing the radioactive substance 1 or the radioactive substance fits into the lower annular member 14). As described above), it is placed in the radioactive substance 1 or the container 1 containing the radioactive substance. In the cushioning member 9, the inner leaf spring 16 comes into contact with the radioactive substance 1 or the periphery of the upper portion of the container 1 containing the radioactive substance.

第３の工程では、搬送設備は、既に保管容器２に収納した放射性物質１または放射性物質を収納した容器１に積み重ねるべき放射性物質１または放射性物質を収納した容器１（例えば、保管容器２の下から２番目に位置すべき放射性物質１または放射性物質を収納した容器１）を、保管容器２の筒状部２２に収納する。このとき、放射性物質１または放射性物質を収納した容器１は、保管容器２内の緩衝部材９の平板部材１２の上に載置され、緩衝部材９の上部環状部材１３が放射性物質１または放射性物質を収納した容器１の下部の周囲を囲むように（放射性物質１または放射性物質を収納した容器１の下部が上部環状部材１３に嵌るように）、保管容器２に収納される。緩衝部材９は、内側板バネ１６が放射性物質１または放射性物質を収納した容器１の下部の周囲と接触する。 In the third step, the transport facility is provided with the radioactive material 1 already stored in the storage container 2 or the radioactive material 1 to be stacked in the container 1 containing the radioactive material or the container 1 containing the radioactive material (for example, under the storage container 2). The radioactive substance 1 to be located second from the above or the container 1) containing the radioactive substance is stored in the tubular portion 22 of the storage container 2. At this time, the radioactive substance 1 or the container 1 containing the radioactive substance is placed on the flat plate member 12 of the buffer member 9 in the storage container 2, and the upper annular member 13 of the buffer member 9 is the radioactive substance 1 or the radioactive substance. Is stored in the storage container 2 so as to surround the lower part of the container 1 containing the radioactive material (so that the lower part of the radioactive material 1 or the container 1 containing the radioactive material fits into the upper annular member 13). In the cushioning member 9, the inner leaf spring 16 comes into contact with the radioactive substance 1 or the periphery of the lower portion of the container 1 containing the radioactive substance.

この一連の工程（放射性物質１または放射性物質を収納した容器１を保管容器２に収納する工程と、緩衝部材９を保管容器２に収納する工程）を、保管容器２の最上部に位置すべき放射性物質１または放射性物質を収納した容器１を保管容器２に収納するまで繰り返して行い、保管容器２の筒状部２２内で、放射性物質１または放射性物質を収納した容器１と緩衝部材９とを上下方向に交互に配置する。 This series of steps (the step of storing the radioactive substance 1 or the container 1 containing the radioactive substance in the storage container 2 and the step of storing the buffer member 9 in the storage container 2) should be located at the top of the storage container 2. Repeat until the radioactive substance 1 or the container 1 containing the radioactive substance is stored in the storage container 2, and in the tubular portion 22 of the storage container 2, the container 1 containing the radioactive substance 1 or the radioactive substance and the buffer member 9 Are arranged alternately in the vertical direction.

第４の工程では、保管容器２の最上部に位置すべき放射性物質１または放射性物質を収納した容器１を保管容器２に収納した後、弾性部材１０を最上部に位置する放射性物質１または放射性物質を収納した容器１の上に載置する。弾性部材１０は、例えばクレーン５などの搬送設備を用いるなど、任意の方法で設置することができる。 In the fourth step, the radioactive substance 1 or the container 1 containing the radioactive substance to be located at the uppermost part of the storage container 2 is stored in the storage container 2, and then the elastic member 10 is located at the uppermost part of the radioactive substance 1 or the radioactive substance 1. Place it on the container 1 containing the substance. The elastic member 10 can be installed by any method such as using a transport facility such as a crane 5.

第５の工程では、蓋１１を筒状部２２の開口部に取り付ける。蓋１１は、例えばクレーン５などの搬送設備を用いるなど、任意の方法で設置することができる。 In the fifth step, the lid 11 is attached to the opening of the tubular portion 22. The lid 11 can be installed by any method, for example, by using a transport facility such as a crane 5.

なお、緩衝部材９は、上記の保管方法のように放射性物質１または放射性物質を収納した容器１と異なる工程にて保管容器２に収納してもよいが、放射性物質１または放射性物質を収納した容器１と同じ工程にて（放射性物質１または放射性物質を収納した容器１と同時に）保管容器２に収納することもできる。緩衝部材９を放射性物質１または放射性物質を収納した容器１と同じ工程にて保管容器２に収納する場合は、放射性物質１または放射性物質を収納した容器１を保管容器２に収納する前に、予め、仕立てエリア７で緩衝部材９を放射性物質１または放射性物質を収納した容器１の上部に載置する。放射性物質１または放射性物質を収納した容器１を保管容器２に収納する工程では、緩衝部材９が載置された放射性物質１または放射性物質を収納した容器１を保管容器２に収納する。 The buffer member 9 may be stored in the storage container 2 in a process different from that of the container 1 containing the radioactive substance 1 or the radioactive substance as in the above storage method, but the radioactive substance 1 or the radioactive substance is stored. It can also be stored in the storage container 2 in the same process as the container 1 (at the same time as the radioactive substance 1 or the container 1 containing the radioactive substance). When the buffer member 9 is stored in the storage container 2 in the same process as the radioactive substance 1 or the container 1 containing the radioactive substance, before storing the radioactive substance 1 or the container 1 containing the radioactive substance in the storage container 2. In advance, the buffer member 9 is placed on the radioactive substance 1 or the upper part of the container 1 containing the radioactive substance in the tailoring area 7. In the step of storing the radioactive substance 1 or the container 1 containing the radioactive substance in the storage container 2, the radioactive substance 1 on which the buffer member 9 is placed or the container 1 containing the radioactive substance is stored in the storage container 2.

本発明の実施例２による放射性物質または放射性物質を収納した容器の保管容器と保管方法を、図５〜図８を用いて説明する。図５〜図８において、図１〜図４と同一の符号は、実施例１による放射性物質または放射性物質を収納した容器の保管容器と同一のまたは対応する構成要素を示し、これらの構成要素については説明を省略する。 The storage container and storage method of the radioactive substance or the container containing the radioactive substance according to the second embodiment of the present invention will be described with reference to FIGS. 5 to 8. In FIGS. 5 to 8, the same reference numerals as those in FIGS. 1 to 4 indicate the same or corresponding components as the storage container of the radioactive substance or the container containing the radioactive substance according to Example 1, and the components thereof. Omits the explanation.

本実施例による放射性物質１または放射性物質を収納した容器１の保管容器２は、実施例１による放射性物質１または放射性物質を収納した容器１の保管容器２と、緩衝部材の構成が異なる。以下では、本実施例による放射性物質１または放射性物質を収納した容器１の保管容器２について、実施例１による放射性物質１または放射性物質を収納した容器１の保管容器２と異なる点を主に説明する。 The storage container 2 of the radioactive substance 1 or the container 1 containing the radioactive substance according to the present embodiment has a different structure of the buffer member from the storage container 2 of the container 1 containing the radioactive substance 1 or the radioactive substance according to the first embodiment. In the following, the storage container 2 of the radioactive substance 1 or the container 1 containing the radioactive substance according to the present embodiment will be mainly described as being different from the storage container 2 of the radioactive substance 1 or the container 1 containing the radioactive substance according to the first embodiment. do.

図５は、本発明の実施例２による放射性物質１または放射性物質を収納した容器１の保管容器２の縦断面図である。保管容器２は、筒状部２２と、蓋１１と、緩衝部材１８と、弾性部材１０を備える。緩衝部材１８は、上下方向に積まれた放射性物質１または放射性物質を収納した容器１同士の間に位置するように、筒状部２２の内部に設置される。緩衝部材１８は、後述するように、平板部材１２、下部環状部材１４、及び可動板バネ１９を備える。 FIG. 5 is a vertical cross-sectional view of the radioactive substance 1 or the storage container 2 of the container 1 containing the radioactive substance according to the second embodiment of the present invention. The storage container 2 includes a tubular portion 22, a lid 11, a cushioning member 18, and an elastic member 10. The cushioning member 18 is installed inside the tubular portion 22 so as to be located between the radioactive substances 1 stacked in the vertical direction or the containers 1 containing the radioactive substances. As will be described later, the cushioning member 18 includes a flat plate member 12, a lower annular member 14, and a movable leaf spring 19.

図６は、緩衝部材１８の縦断面図である。図８は、緩衝部材１８の上面図である。緩衝部材１８は、平板部材１２、下部環状部材１４、内側板バネ１６、可動板バネ１９、及び吊り部１７を備える。緩衝部材１８は、実施例１での緩衝部材９が備える上部環状部材１３と外側板バネ１５を備えず、可動板バネ１９を備える。 FIG. 6 is a vertical cross-sectional view of the cushioning member 18. FIG. 8 is a top view of the cushioning member 18. The cushioning member 18 includes a flat plate member 12, a lower annular member 14, an inner leaf spring 16, a movable leaf spring 19, and a suspension portion 17. The cushioning member 18 does not include the upper annular member 13 and the outer leaf spring 15 included in the cushioning member 9 in the first embodiment, but includes a movable leaf spring 19.

実施例１では、緩衝部材９の外側板バネ１５が保管容器２の内周面（筒状部２２の内周面）と接触するが、本実施例では、可動板バネ１９が保管容器２の内周面と接触する。また、実施例１では、吊り部１７が上部環状部材１３に設置されているが、本実施例では、吊り部１７は、平板部材１２の外周部に設置されている。さらに、本実施例では、平板部材１２は、上面の外周部に凹部１２ａを備える。 In the first embodiment, the outer leaf spring 15 of the cushioning member 9 comes into contact with the inner peripheral surface of the storage container 2 (the inner peripheral surface of the cylindrical portion 22), but in this embodiment, the movable leaf spring 19 is the storage container 2. Contact with the inner peripheral surface. Further, in the first embodiment, the suspension portion 17 is installed on the upper annular member 13, but in the present embodiment, the suspension portion 17 is installed on the outer peripheral portion of the flat plate member 12. Further, in this embodiment, the flat plate member 12 is provided with a recess 12a on the outer peripheral portion of the upper surface.

可動板バネ１９は、平板部材１２の上面に、周方向に９０°ごとに４個設置されている。可動板バネ１９は、固定部材２０により平板部材１２の凹部１２ａに固定されている。固定部材２０は、例えば、ピンで構成することができる。 Four movable leaf springs 19 are installed on the upper surface of the flat plate member 12 at 90 ° intervals in the circumferential direction. The movable leaf spring 19 is fixed to the recess 12a of the flat plate member 12 by the fixing member 20. The fixing member 20 can be composed of, for example, a pin.

可動板バネ１９は、平面部１９ａと、板バネ部１９ｂと、支点部１９ｃを備える緩衝部である。平面部１９ａは、剛性を有し、バネとして作用しない板状部分である。板バネ部１９ｂは、板バネで構成されている。支点部１９ｃは、平面部１９ａと板バネ部１９ｂを接続する部分であり、固定部材２０を介して可動板バネ１９を平板部材１２に固定している部分である。 The movable leaf spring 19 is a buffer portion including a flat surface portion 19a, a leaf spring portion 19b, and a fulcrum portion 19c. The flat surface portion 19a is a plate-shaped portion that has rigidity and does not act as a spring. The leaf spring portion 19b is composed of a leaf spring. The fulcrum portion 19c is a portion that connects the flat surface portion 19a and the leaf spring portion 19b, and is a portion that fixes the movable leaf spring 19 to the flat plate member 12 via the fixing member 20.

可動板バネ１９は、支点部１９ｃで湾曲したような形状をしており、平面部１９ａが平板部材１２の上方に位置し、板バネ部１９ｂが平板部材１２から水平方向に突出して平板部材１２の側方に位置する。平面部１９ａは、緩衝部材１８の上面部であり、保管容器２に収納された放射性物質１または放射性物質を収納した容器１は、平面部１９ａに載置される。板バネ部１９ｂは、下部環状部材１４の側方まで延在するような長さを有してもよい。可動板バネ１９は、支点部１９ｃを支点（中心）として（すなわち、固定部材２０を回転軸として）、回動することができる。 The movable leaf spring 19 has a shape curved at the fulcrum portion 19c, the flat surface portion 19a is located above the flat plate member 12, and the leaf spring portion 19b projects horizontally from the flat plate member 12 to form the flat plate member 12. Located on the side of. The flat surface portion 19a is an upper surface portion of the cushioning member 18, and the radioactive substance 1 stored in the storage container 2 or the container 1 containing the radioactive substance is placed on the flat surface portion 19a. The leaf spring portion 19b may have a length extending to the side of the lower annular member 14. The movable leaf spring 19 can rotate with the fulcrum portion 19c as the fulcrum (center) (that is, the fixing member 20 as the rotation axis).

可動板バネ１９は、放射性物質１または放射性物質を収納した容器１が平面部１９ａに載置されていないときは、上方からの荷重がかからないために板バネ部１９ｂが下方を向いており（下方に延在しており）、保管容器２の内周面（筒状部２２の内周面）と接触しない。 In the movable leaf spring 19, when the radioactive substance 1 or the container 1 containing the radioactive substance is not placed on the flat surface portion 19a, the leaf spring portion 19b faces downward because no load is applied from above (downward). Does not come into contact with the inner peripheral surface of the storage container 2 (inner peripheral surface of the tubular portion 22).

図７は、放射性物質１または放射性物質を収納した容器１が緩衝部材１８の上面部に載置された状態の緩衝部材１８の縦断面図である。可動板バネ１９は、放射性物質１または放射性物質を収納した容器１が平面部１９ａに載置されるときに、平面部１９ａが支点部１９ｃを支点として下方に回動し、板バネ部１９ｂが支点部１９ｃを支点として上方に回動する。板バネ部１９ｂは、上方に回動すると、平板部材１２から筒状部２２に向かって水平方向に延在して、筒状部２２の内周面（保管容器２の内周面）と接触する。このようにして、緩衝部材１８の可動板バネ１９は、放射性物質１または放射性物質を収納した容器１が保管容器２に収納されたときに保管容器２の内周面と接触し、保管容器２に衝撃が加わったときに、保管容器２の内部で放射性物質１または放射性物質を収納した容器１と保管容器２とが水平方向に衝突するのを抑制する。 FIG. 7 is a vertical cross-sectional view of the cushioning member 18 in a state where the radioactive material 1 or the container 1 containing the radioactive material is placed on the upper surface of the cushioning member 18. In the movable leaf spring 19, when the radioactive substance 1 or the container 1 containing the radioactive substance is placed on the flat surface portion 19a, the flat surface portion 19a rotates downward with the fulcrum portion 19c as the fulcrum, and the leaf spring portion 19b It rotates upward with the fulcrum portion 19c as a fulcrum. When the leaf spring portion 19b rotates upward, it extends horizontally from the flat plate member 12 toward the tubular portion 22 and comes into contact with the inner peripheral surface of the tubular portion 22 (inner peripheral surface of the storage container 2). do. In this way, the movable leaf spring 19 of the buffer member 18 comes into contact with the inner peripheral surface of the storage container 2 when the radioactive substance 1 or the container 1 containing the radioactive substance is stored in the storage container 2, and the storage container 2 When an impact is applied to the container 2, the radioactive substance 1 or the container 1 containing the radioactive substance and the storage container 2 are prevented from colliding with each other in the horizontal direction inside the storage container 2.

可動板バネ１９は、放射性物質１または放射性物質を収納した容器１が平面部１９ａから取り除かれ、上方からの荷重がかからなくなると、平面部１９ａが支点部１９ｃを支点として上方に回動し、板バネ部１９ｂが支点部１９ｃを支点として下方に回動して下方を向くので、保管容器２の内周面と接触しない。 In the movable leaf spring 19, when the radioactive substance 1 or the container 1 containing the radioactive substance is removed from the flat surface portion 19a and no load is applied from above, the flat surface portion 19a rotates upward with the fulcrum portion 19c as a fulcrum. Since the leaf spring portion 19b rotates downward with the fulcrum portion 19c as a fulcrum and faces downward, it does not come into contact with the inner peripheral surface of the storage container 2.

平板部材１２の凹部１２ａは、可動板バネ１９を固定部材２０で平板部材１２に固定できるような大きさとする。凹部１２ａは、平板部材１２の周方向の全体に設けてもよく、周方向の一部に設けてもよい。凹部１２ａは、放射性物質１または放射性物質を収納した容器１が緩衝部材１８の上面部（可動板バネ１９の平面部１９ａ）に載置されたときに、放射性物質１または放射性物質を収納した容器１から受ける荷重により可動板バネ１９と固定部材２０が破損するのを防ぐ。 The recess 12a of the flat plate member 12 is sized so that the movable leaf spring 19 can be fixed to the flat plate member 12 by the fixing member 20. The recess 12a may be provided in the entire circumferential direction of the flat plate member 12, or may be provided in a part of the circumferential direction. The recess 12a is a container containing the radioactive substance 1 or the radioactive substance when the radioactive substance 1 or the container 1 containing the radioactive substance is placed on the upper surface portion (the flat surface portion 19a of the movable leaf spring 19) of the cushioning member 18. Prevents the movable leaf spring 19 and the fixing member 20 from being damaged by the load received from 1.

実施例１による放射性物質１または放射性物質を収納した容器１の保管容器２では、保管容器２に収納した放射性物質１または放射性物質を収納した容器１に緩衝部材９を載置するときには、緩衝部材９の外側板バネ１５と保管容器２の内周面との接触により、これらの間に摩擦力が生じる。このため、放射性物質１または放射性物質を収納した容器１に緩衝部材９をクレーン５などの搬送設備で載置するときには、この搬送設備で緩衝部材９を保管容器２（筒状部２２）の内部に押し込む必要があるとともに、外側板バネ１５と保管容器２には、この摩擦力を考慮した構造強度が必要である。 In the storage container 2 of the radioactive substance 1 or the container 1 containing the radioactive substance according to the first embodiment, when the buffer member 9 is placed on the radioactive substance 1 stored in the storage container 2 or the container 1 containing the radioactive substance, the buffer member 9 is placed. The contact between the outer leaf spring 15 of 9 and the inner peripheral surface of the storage container 2 causes a frictional force between them. Therefore, when the cushioning member 9 is placed on the radioactive substance 1 or the container 1 containing the radioactive substance by a transport facility such as a crane 5, the shock absorber 9 is placed inside the storage container 2 (cylindrical portion 22) by this transport facility. The outer leaf spring 15 and the storage container 2 are required to have a structural strength in consideration of this frictional force.

本実施例による放射性物質１または放射性物質を収納した容器１の保管容器２では、保管容器２に収納した放射性物質１または放射性物質を収納した容器１に緩衝部材１８を載置するときには、可動板バネ１９に上方からの荷重がかかっていないので、緩衝部材１８は、保管容器２の内周面と接触しない。このため、放射性物質１または放射性物質を収納した容器１に緩衝部材１８を搬送設備で載置するときには、搬送設備で緩衝部材１８を保管容器２（筒状部２２）の内部に押し込む必要がなく、緩衝部材１８の載置における作業性の向上や搬送設備の簡略化が可能である。さらに、緩衝部材１８と保管容器２との間に摩擦力が生じないため、これらの構造強度には、この摩擦力を考慮する必要がないという利点もある。 In the storage container 2 of the radioactive substance 1 or the container 1 containing the radioactive substance according to the present embodiment, when the cushioning member 18 is placed on the radioactive substance 1 stored in the storage container 2 or the container 1 containing the radioactive substance, a movable plate is used. Since no load is applied to the spring 19 from above, the cushioning member 18 does not come into contact with the inner peripheral surface of the storage container 2. Therefore, when the buffer member 18 is placed on the radioactive substance 1 or the container 1 containing the radioactive substance by the transport equipment, it is not necessary to push the buffer member 18 into the storage container 2 (cylindrical portion 22) by the transport equipment. It is possible to improve workability in mounting the cushioning member 18 and simplify the transport equipment. Further, since no frictional force is generated between the cushioning member 18 and the storage container 2, there is an advantage that it is not necessary to consider this frictional force in these structural strengths.

以下では、本実施例による保管容器２に放射性物質１または放射性物質を収納した容器１を保管する方法の例を説明する。本実施例による放射性物質１または放射性物質を収納した容器１の保管方法は、実施例１による放射性物質１または放射性物質を収納した容器１の保管方法と、第１、第４、及び第５の工程が同じであるが、第２、及び第３の工程が異なる。以下では、第２、及び第３の工程のみを説明する。 Hereinafter, an example of a method of storing the radioactive substance 1 or the container 1 containing the radioactive substance in the storage container 2 according to the present embodiment will be described. The storage method of the radioactive substance 1 or the container 1 containing the radioactive substance according to the present embodiment is the storage method of the radioactive substance 1 or the container 1 containing the radioactive substance according to the first embodiment, and the first, fourth, and fifth methods. The steps are the same, but the second and third steps are different. In the following, only the second and third steps will be described.

第２の工程では、搬送設備は、緩衝部材１８を保管容器２の筒状部２２に収納する。搬送設備は、緩衝部材１８を吊り部１７で吊り下げて筒状部２２の内部に移動させ、保管容器２に収納した放射性物質１または放射性物質を収納した容器１の上部に載置する。このとき、緩衝部材１８は、下部環状部材１４が放射性物質１または放射性物質を収納した容器１の上部の周囲を囲むように（放射性物質１または放射性物質を収納した容器１の上部が下部環状部材１４に嵌るように）、放射性物質１または放射性物質を収納した容器１に載置される。緩衝部材１８は、内側板バネ１６が放射性物質１または放射性物質を収納した容器１の上部の周囲と接触する。この工程では、可動板バネ１９の板バネ部１９ｂは、下方を向いており、保管容器２の内周面（筒状部２２の内周面）と接触しない。すなわち、緩衝部材１８は、保管容器２の内周面と接触していない。 In the second step, the transport equipment stores the cushioning member 18 in the tubular portion 22 of the storage container 2. In the transport equipment, the cushioning member 18 is suspended by the suspension portion 17 and moved inside the tubular portion 22, and is placed on the radioactive substance 1 stored in the storage container 2 or the upper part of the container 1 containing the radioactive substance. At this time, in the buffer member 18, the lower annular member 14 surrounds the upper part of the container 1 containing the radioactive substance 1 or the radioactive substance (the upper part of the container 1 containing the radioactive substance 1 or the radioactive substance is the lower annular member). It is placed in the radioactive material 1 or the container 1 containing the radioactive material (so that it fits in 14). In the cushioning member 18, the inner leaf spring 16 comes into contact with the radioactive substance 1 or the periphery of the upper part of the container 1 containing the radioactive substance. In this step, the leaf spring portion 19b of the movable leaf spring 19 faces downward and does not come into contact with the inner peripheral surface of the storage container 2 (the inner peripheral surface of the cylindrical portion 22). That is, the cushioning member 18 is not in contact with the inner peripheral surface of the storage container 2.

第３の工程では、搬送設備は、既に保管容器２に収納した放射性物質１または放射性物質を収納した容器１に積み重ねるべき放射性物質１または放射性物質を収納した容器１を、保管容器２の筒状部２２に収納する。このとき、放射性物質１または放射性物質を収納した容器１は、保管容器２内の緩衝部材１８の可動板バネ１９の平面部１９ａに載置される。放射性物質１または放射性物質を収納した容器１が平面部１９ａに載置されるとき、可動板バネ１９は、平面部１９ａが下方に回動し、板バネ部１９ｂが上方に回動する。板バネ部１９ｂは、上方に回動すると、保管容器２の内周面（筒状部２２の内周面）と接触する。このようにして、緩衝部材１８は、保管容器２の筒状部２２の内周面と接触可能である。 In the third step, the transport equipment has the radioactive substance 1 already stored in the storage container 2 or the container 1 containing the radioactive substance 1 to be stacked in the container 1 containing the radioactive substance, and the container 1 containing the radioactive substance in the cylindrical shape of the storage container 2. It is stored in the part 22. At this time, the radioactive substance 1 or the container 1 containing the radioactive substance is placed on the flat surface portion 19a of the movable leaf spring 19 of the cushioning member 18 in the storage container 2. When the radioactive substance 1 or the container 1 containing the radioactive substance is placed on the flat surface portion 19a, the flat surface portion 19a of the movable leaf spring 19 rotates downward and the leaf spring portion 19b rotates upward. When the leaf spring portion 19b rotates upward, it comes into contact with the inner peripheral surface of the storage container 2 (the inner peripheral surface of the tubular portion 22). In this way, the cushioning member 18 can come into contact with the inner peripheral surface of the cylindrical portion 22 of the storage container 2.

実施例１と同様に、放射性物質１または放射性物質を収納した容器１を保管容器２に収納する工程と、緩衝部材１８を保管容器２に収納する工程を、保管容器２の最上部に位置すべき放射性物質１または放射性物質を収納した容器１を保管容器２に収納するまで繰り返して行い、保管容器２の筒状部２２内で、放射性物質１または放射性物質を収納した容器１と緩衝部材１８とを上下方向に交互に配置する。 Similar to the first embodiment, the step of storing the radioactive substance 1 or the container 1 containing the radioactive substance in the storage container 2 and the step of storing the buffer member 18 in the storage container 2 are located at the uppermost part of the storage container 2. Repeat until the radioactive substance 1 or the container 1 containing the radioactive substance is stored in the storage container 2, and in the tubular portion 22 of the storage container 2, the container 1 containing the radioactive substance 1 or the radioactive substance and the buffer member 18 And are arranged alternately in the vertical direction.

本実施例でも、実施例１と同様に、緩衝部材１８は、放射性物質１または放射性物質を収納した容器１と同じ工程にて（放射性物質１または放射性物質を収納した容器１と同時に）保管容器２に収納することもできる。緩衝部材１８を放射性物質１または放射性物質を収納した容器１と同じ工程にて保管容器２に収納する場合は、放射性物質１または放射性物質を収納した容器１を保管容器２に収納する前に、予め、仕立てエリア７で緩衝部材１８を放射性物質１または放射性物質を収納した容器１の上部に載置する。放射性物質１または放射性物質を収納した容器１を保管容器２に収納する工程では、緩衝部材１８が載置された放射性物質１または放射性物質を収納した容器１を保管容器２に収納する。 In this embodiment as well, as in the first embodiment, the buffer member 18 is a storage container (at the same time as the radioactive substance 1 or the container 1 containing the radioactive substance) in the same process as the container 1 containing the radioactive substance 1 or the radioactive substance. It can also be stored in 2. When the buffer member 18 is stored in the storage container 2 in the same process as the radioactive substance 1 or the container 1 containing the radioactive substance, before the radioactive substance 1 or the container 1 containing the radioactive substance is stored in the storage container 2. In advance, the buffer member 18 is placed on the radioactive substance 1 or the upper part of the container 1 containing the radioactive substance in the tailoring area 7. In the step of storing the radioactive substance 1 or the container 1 containing the radioactive substance in the storage container 2, the radioactive substance 1 on which the buffer member 18 is placed or the container 1 containing the radioactive substance is stored in the storage container 2.

なお、本発明は、上記の実施例に限定されるものではなく、様々な変形が可能である。例えば、上記の実施例は、本発明を分かりやすく説明するために詳細に説明したものであり、本発明は、必ずしも説明した全ての構成を備える態様に限定されるものではない。また、ある実施例の構成の一部を他の実施例の構成に置き換えることが可能である。また、ある実施例の構成に他の実施例の構成を加えることも可能である。また、各実施例の構成の一部について、削除したり、他の構成を追加・置換したりすることが可能である。 The present invention is not limited to the above embodiment, and various modifications are possible. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and the present invention is not necessarily limited to the embodiment including all the described configurations. Further, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment. It is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to delete a part of the configurations of each embodiment and add / replace other configurations.

１…放射性物質または放射性物質を収納した容器、２…保管容器、３…保管施設、４…保管エリア、５…クレーン、６…移送容器、７…仕立てエリア、８…架台、９…緩衝部材、１０…弾性部材、１１…蓋、１２…平板部材、１２ａ…凹部、１３…上部環状部材、１４…下部環状部材、１５…外側板バネ、１６…内側板バネ、１７…吊り部、１８…緩衝部材、１９…可動板バネ、１９ａ…平面部、１９ｂ…板バネ部、１９ｃ…支点部、２０…固定部材、２２…筒状部。 1 ... Container containing radioactive material or radioactive material, 2 ... Storage container, 3 ... Storage facility, 4 ... Storage area, 5 ... Crane, 6 ... Transfer container, 7 ... Tailoring area, 8 ... Stand, 9 ... Cushioning member, 10 ... Elastic member, 11 ... Lid, 12 ... Flat plate member, 12a ... Recess, 13 ... Upper annular member, 14 ... Lower annular member, 15 ... Outer leaf spring, 16 ... Inner leaf spring, 17 ... Suspended part, 18 ... Buffer Member, 19 ... Movable leaf spring, 19a ... Flat part, 19b ... Leaf spring part, 19c ... Supporting point part, 20 ... Fixed member, 22 ... Cylindrical part.

Claims (5)

上部に開口部を有し、複数の放射性物質または放射性物質を収納した複数の容器を上下方向に積んで収納可能な筒状部と、
上下方向に積まれた前記放射性物質または前記容器の間に設置される緩衝部材と、
前記開口部に設置される蓋と、
最上部の前記放射性物質または前記容器と前記蓋との間に設置される弾性部材と、
を備え、
前記緩衝部材は、
平板部材と、
前記平板部材に設置され、前記平板部材から水平方向に突出する緩衝部と、
前記平板部材の下面に立設する円環状の下部環状部材と、
前記下部環状部材の内周面に設置され、前記放射性物質または前記容器と接触可能な内側板バネと、
を備える、
ことを特徴とする放射性物質または放射性物質を収納した容器の保管容器。 A tubular part that has an opening at the top and can store multiple radioactive substances or multiple containers containing radioactive substances in the vertical direction.
With the radioactive material stacked in the vertical direction or the cushioning member installed between the containers,
The lid installed in the opening and
The radioactive material at the top or the elastic member installed between the container and the lid,
With
The cushioning member is
Flat plate member and
A cushioning portion installed on the flat plate member and projecting horizontally from the flat plate member,
An annular lower annular member standing on the lower surface of the flat plate member,
An inner leaf spring installed on the inner peripheral surface of the lower annular member and capable of contacting the radioactive substance or the container,
To prepare
Storage containers container containing radioactive substances or radioactive materials, characterized in that. 前記緩衝部材は、
前記平板部材の上面に立設する円環状の上部環状部材と、
前記上部環状部材の内周面に設置され、前記放射性物質または前記容器と接触可能な内側板バネと、
前記緩衝部として、前記平板部材の外周部に設置され、前記筒状部の内周面と接触可能な板バネと、
を備える、
請求項１に記載の放射性物質または放射性物質を収納した容器の保管容器。 The cushioning member is
An annular upper annular member standing on the upper surface of the flat plate member,
An inner leaf spring installed on the inner peripheral surface of the upper annular member and capable of contacting the radioactive substance or the container,
As the cushioning portion, a leaf spring installed on the outer peripheral portion of the flat plate member and capable of contacting the inner peripheral surface of the cylindrical portion,
To prepare
A storage container for the radioactive substance according to claim 1 or a container containing the radioactive substance. 前記緩衝部材は、前記緩衝部として、前記平板部材に設置された可動板バネを備え、
前記可動板バネは、
前記平板部材の上方に位置する平面部と、
前記平板部材の側方に位置する板バネ部と、
を備え、
前記平面部に前記放射性物質または前記容器が載置されると、前記板バネ部が上方に回動して前記筒状部の内周面と接触可能であるように構成されている、
請求項１に記載の放射性物質または放射性物質を収納した容器の保管容器。 The cushioning member includes a movable leaf spring installed on the flat plate member as the cushioning portion.
The movable leaf spring is
A flat surface portion located above the flat plate member and
A leaf spring portion located on the side of the flat plate member and
With
When the radioactive substance or the container is placed on the flat surface portion, the leaf spring portion is configured to rotate upward so as to be in contact with the inner peripheral surface of the tubular portion.
A storage container for the radioactive substance according to claim 1 or a container containing the radioactive substance. 放射性物質または放射性物質を収納した容器を保管容器に収納する第１工程と、
緩衝部材を、前記保管容器に収納した前記放射性物質または前記容器に載置する第２工程と、
前記保管容器に収納した前記放射性物質または前記容器に積み重ねるべき放射性物質または放射性物質を収納した容器を、前記保管容器内の前記緩衝部材に載置して、前記保管容器に収納する第３工程と、
前記保管容器の最上部に位置すべき放射性物質または放射性物質を収納した容器を前記保管容器に収納した後、弾性部材を、最上部に位置する前記放射性物質または前記容器に載置する第４工程と、
を有し、
前記緩衝部材が、平板部材と、前記平板部材に設置され、前記平板部材から水平方向に突出し、前記保管容器の内周面と接触可能な緩衝部とを備え、
前記緩衝部が、前記平板部材の外周部に設置された板バネであり、
前記第２工程では、前記板バネが、前記保管容器の内周面と接触する、
ことを特徴とする放射性物質または放射性物質を収納した容器の保管方法。 The first step of storing radioactive material or a container containing radioactive material in a storage container, and
The second step of placing the buffer member in the radioactive substance or the container stored in the storage container, and
The third step of placing the radioactive substance stored in the storage container or the container containing the radioactive substance or the radioactive substance to be stacked in the container on the buffer member in the storage container and storing the radioactive substance in the storage container. ,
A fourth step of placing the radioactive material located at the top of the storage container or the container containing the radioactive material in the storage container, and then placing the elastic member on the radioactive material or the container located at the top. When,
Have ,
The cushioning member includes a flat plate member and a cushioning portion which is installed on the flat plate member, projects horizontally from the flat plate member, and can come into contact with the inner peripheral surface of the storage container.
The cushioning portion is a leaf spring installed on the outer peripheral portion of the flat plate member.
In the second step, the leaf spring comes into contact with the inner peripheral surface of the storage container.
A method of storing radioactive substances or containers containing radioactive substances. 放射性物質または放射性物質を収納した容器を保管容器に収納する第１工程と、
緩衝部材を、前記保管容器に収納した前記放射性物質または前記容器に載置する第２工程と、
前記保管容器に収納した前記放射性物質または前記容器に積み重ねるべき放射性物質または放射性物質を収納した容器を、前記保管容器内の前記緩衝部材に載置して、前記保管容器に収納する第３工程と、
前記保管容器の最上部に位置すべき放射性物質または放射性物質を収納した容器を前記保管容器に収納した後、弾性部材を、最上部に位置する前記放射性物質または前記容器に載置する第４工程と、
を有し、
前記緩衝部材が、平板部材と、前記平板部材に設置され、前記平板部材から水平方向に突出し、前記保管容器の内周面と接触可能な緩衝部とを備え、
前記緩衝部が、前記平板部材の上方に位置する平面部と、前記平板部材の側方に位置する板バネ部とを備える可動板バネであり、
前記第２工程では、前記板バネ部が、前記保管容器の内周面と接触せず、
前記第３工程では、前記保管容器に収納した前記放射性物質または前記容器に積み重ねるべき放射性物質または放射性物質を収納した容器を、前記可動板バネの前記平面部に載置すると、前記可動板バネは、前記板バネ部が上方に回動して前記保管容器の内周面と接触する、
ことを特徴とする放射性物質または放射性物質を収納した容器の保管方法。 The first step of storing radioactive material or a container containing radioactive material in a storage container, and
The second step of placing the buffer member in the radioactive substance or the container stored in the storage container, and
The third step of placing the radioactive substance stored in the storage container or the container containing the radioactive substance or the radioactive substance to be stacked in the container on the buffer member in the storage container and storing the radioactive substance in the storage container. ,
A fourth step of placing the radioactive material located at the top of the storage container or the container containing the radioactive material in the storage container, and then placing the elastic member on the radioactive material or the container located at the top. When,
Have ,
The cushioning member includes a flat plate member and a cushioning portion which is installed on the flat plate member, projects horizontally from the flat plate member, and can come into contact with the inner peripheral surface of the storage container.
The cushioning portion is a movable leaf spring including a flat surface portion located above the flat plate member and a leaf spring portion located on the side of the flat plate member.
In the second step, the leaf spring portion does not come into contact with the inner peripheral surface of the storage container.
In the third step, when the radioactive substance stored in the storage container or the container containing the radioactive substance or the radioactive substance to be stacked in the container is placed on the flat surface portion of the movable leaf spring, the movable leaf spring is released. , The leaf spring portion rotates upward and comes into contact with the inner peripheral surface of the storage container.
A method of storing radioactive substances or containers containing radioactive substances.
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